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Old 05-10-2017, 09:09 AM   #1
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Orange70chevy's Avatar
Join Date: Feb 2004
Location: Penelope, Texas
Posts: 393
Voltage Regulator

I about got my truck all done. I was work around the voltage regulator I touched the cover and it was warm. The key was off and nothing was on. I disconnected the battery and it cooled off.
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Old 05-10-2017, 11:00 AM   #2
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Join Date: Jun 2005
Location: Winona Lake, IN
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Re: Voltage Regulator

You might ask a mod to move this to the electrical section. Vettevet will probably chime in, he is one of the resident experts on electrical here.
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Old 05-10-2017, 11:06 AM   #3
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Re: Voltage Regulator

Reconnect battery. If it starts to warm back up, remove R-F plug from alternator. If it cools down, there is probably a shorted Diode inside the alternator.
Check voltage on the F-2-3-4 wires on the regulator plug. Only pin #3 should have 12 volts with key OFF. Check by back-probing the wires that go into the plug.
'67 GMC, 3/4 ton, 292, 4 spd
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